diff options
Diffstat (limited to 'arch/powerpc/kernel/head_40x.S')
| -rw-r--r-- | arch/powerpc/kernel/head_40x.S | 78 |
1 files changed, 31 insertions, 47 deletions
diff --git a/arch/powerpc/kernel/head_40x.S b/arch/powerpc/kernel/head_40x.S index 872a6af83ba..7d7d8635227 100644 --- a/arch/powerpc/kernel/head_40x.S +++ b/arch/powerpc/kernel/head_40x.S @@ -394,7 +394,7 @@ label: NORMAL_EXCEPTION_PROLOG mr r4,r12 /* Pass SRR0 as arg2 */ li r5,0 /* Pass zero as arg3 */ - EXC_XFER_EE_LITE(0x400, handle_page_fault) + EXC_XFER_LITE(0x400, handle_page_fault) /* 0x0500 - External Interrupt Exception */ EXCEPTION(0x0500, HardwareInterrupt, do_IRQ, EXC_XFER_LITE) @@ -430,30 +430,18 @@ label: EXCEPTION(0x0F00, Trap_0F, unknown_exception, EXC_XFER_EE) /* 0x1000 - Programmable Interval Timer (PIT) Exception */ - START_EXCEPTION(0x1000, Decrementer) - NORMAL_EXCEPTION_PROLOG - lis r0,TSR_PIS@h - mtspr SPRN_TSR,r0 /* Clear the PIT exception */ - addi r3,r1,STACK_FRAME_OVERHEAD - EXC_XFER_LITE(0x1000, timer_interrupt) - -#if 0 -/* NOTE: - * FIT and WDT handlers are not implemented yet. - */ + . = 0x1000 + b Decrementer /* 0x1010 - Fixed Interval Timer (FIT) Exception */ - STND_EXCEPTION(0x1010, FITException, unknown_exception) + . = 0x1010 + b FITException /* 0x1020 - Watchdog Timer (WDT) Exception */ -#ifdef CONFIG_BOOKE_WDT - CRITICAL_EXCEPTION(0x1020, WDTException, WatchdogException) -#else - CRITICAL_EXCEPTION(0x1020, WDTException, unknown_exception) -#endif -#endif + . = 0x1020 + b WDTException /* 0x1100 - Data TLB Miss Exception * As the name implies, translation is not in the MMU, so search the @@ -738,6 +726,29 @@ label: (MSR_KERNEL & ~(MSR_ME|MSR_DE|MSR_CE)), \ NOCOPY, crit_transfer_to_handler, ret_from_crit_exc) + /* Programmable Interval Timer (PIT) Exception. (from 0x1000) */ +Decrementer: + NORMAL_EXCEPTION_PROLOG + lis r0,TSR_PIS@h + mtspr SPRN_TSR,r0 /* Clear the PIT exception */ + addi r3,r1,STACK_FRAME_OVERHEAD + EXC_XFER_LITE(0x1000, timer_interrupt) + + /* Fixed Interval Timer (FIT) Exception. (from 0x1010) */ +FITException: + NORMAL_EXCEPTION_PROLOG + addi r3,r1,STACK_FRAME_OVERHEAD; + EXC_XFER_EE(0x1010, unknown_exception) + + /* Watchdog Timer (WDT) Exception. (from 0x1020) */ +WDTException: + CRITICAL_EXCEPTION_PROLOG; + addi r3,r1,STACK_FRAME_OVERHEAD; + EXC_XFER_TEMPLATE(WatchdogException, 0x1020+2, + (MSR_KERNEL & ~(MSR_ME|MSR_DE|MSR_CE)), + NOCOPY, crit_transfer_to_handler, + ret_from_crit_exc) + /* * The other Data TLB exceptions bail out to this point * if they can't resolve the lightweight TLB fault. @@ -747,7 +758,7 @@ DataAccess: mfspr r5,SPRN_ESR /* Grab the ESR, save it, pass arg3 */ stw r5,_ESR(r11) mfspr r4,SPRN_DEAR /* Grab the DEAR, save it, pass arg2 */ - EXC_XFER_EE_LITE(0x300, handle_page_fault) + EXC_XFER_LITE(0x300, handle_page_fault) /* Other PowerPC processors, namely those derived from the 6xx-series * have vectors from 0x2100 through 0x2F00 defined, but marked as reserved. @@ -811,14 +822,6 @@ finish_tlb_load: rfi /* Should sync shadow TLBs */ b . /* prevent prefetch past rfi */ -/* extern void giveup_fpu(struct task_struct *prev) - * - * The PowerPC 4xx family of processors do not have an FPU, so this just - * returns. - */ -_ENTRY(giveup_fpu) - blr - /* This is where the main kernel code starts. */ start_here: @@ -927,25 +930,6 @@ initial_mmu: tlbwe r4,r0,TLB_DATA /* Load the data portion of the entry */ tlbwe r3,r0,TLB_TAG /* Load the tag portion of the entry */ -#if defined(CONFIG_SERIAL_TEXT_DEBUG) && defined(SERIAL_DEBUG_IO_BASE) - - /* Load a TLB entry for the UART, so that ppc4xx_progress() can use - * the UARTs nice and early. We use a 4k real==virtual mapping. */ - - lis r3,SERIAL_DEBUG_IO_BASE@h - ori r3,r3,SERIAL_DEBUG_IO_BASE@l - mr r4,r3 - clrrwi r4,r4,12 - ori r4,r4,(TLB_WR|TLB_I|TLB_M|TLB_G) - - clrrwi r3,r3,12 - ori r3,r3,(TLB_VALID | TLB_PAGESZ(PAGESZ_4K)) - - li r0,0 /* TLB slot 0 */ - tlbwe r4,r0,TLB_DATA - tlbwe r3,r0,TLB_TAG -#endif /* CONFIG_SERIAL_DEBUG_TEXT && SERIAL_DEBUG_IO_BASE */ - isync /* Establish the exception vector base |